Ontario Geological Survey
Permanent Link to this Record:
MDI42L06NE00016
| Record Name(s) | Jonsmith - 1958, Copper Zone - 1958, Kowkash - 1986 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1980-Apr-24 |
| Date Last Modified | 2023-Aug-03 |
| Created By | |
| Revised By |
Primary Commodities: Gold, Copper
Secondary Commodities: Silver, Zinc
Township or Area: O Sullivan Lake Area
Latitude: 50° 26' 43.84" Longitude: -87° 2' 1.58"
UTM Zone: 16 Easting: 497602 Northing: 5588167 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 42L06NE
Point Location Description: T-10 on map in Assessment report 42L06NE0019
Location Method: Data Compilation
1958: Jonsmith Mines Ltd. conducted prospecting and discovered the zone. 1959: Jonsmith Mines conducted magnetic and EM surveys and drilled 14 DDH totalling 1129.6 m. 1983: Odessa Explorations Inc. conducted airborne magnetic and EM surveys, and drilled 7 DDH totalling 609.6 m. 1986: Kowkash Gold Corp. drilled 7 DDH totalling 609.6 m. 2004: carried out prospecting, blasting, and sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 63.1012 | 42L06NE0042 | 42L06NE0042 |
| 26 | 42L06NE0017 | 42L06NE0017 |
| 18 | 42L06NE0056 | 42L06NE0056 |
| 27 | 42L06NE0014 | 42L06NE0014 |
| 42L06NE0011 | 20000005122 | 20000005122 |
| 2.32526 | 20000001409 | 20000001409 |
| 2.6906 | 42L06NE0019 | 42L06NE0019 |
Province: Superior
Subprovince: Wabigoon
Terrane: Eastern Wabigoon
Belt: Onaman-Tashota
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Intermediate lava flow-unsubdivided | 1 | Host |
|---|---|---|---|---|
| Vein | 2 | Quartz | Host |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrrhotite | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Pyrite | Economic | Ore | ||||
| 4 | Sphalerite | Economic | Ore | ||||
| 5 | Gold | Economic | Ore |
Dec 17, 2020 (Therese Pettigrew) - Prospecting by Jonsmith Mines in 1958 discovered highly rusty basalt on higher ground to the east of the Discovery Zone and some 50 m north of an exposure of diabase. Three pits and a trench were sunk. The pits exposed well-jointed basalt, which held pyrrhotite and chalcopyrite along thin fractures. Some quartz is present and a porphyry dike lies close to one pit, but no significant structural control was seen along which mineralization might be concentrated. The area was tested by five drill holes in 1959, one of which intersected a shear zone in basalt which contained much quartz and a little pyrite, and which assayed 0.31 ounces of gold per ton over a one-metre width. The other four holes contained shear or breccia zones with sulphides, but only low contents of gold (Assessment report 20000001409). Minor chalcopyrite, pyrite, and pyrrhotite as disseminations and narrow veins in intercalated intermediate to felsic metavolcanics (Shklanka, 1969). Odessa’s DDH 15 contained up to 12% pyrrhotite and 1.5% chalcopyrite in an epidotized section with strong pyrrhotites streaks at 107.4 feet, and blebs of pyrrhotite with 30% chalcopyrite at 127 feet. This hole returned up to 0.19% Cu and 0.527 ppb Au. DDH 17 returned up to 2.64 ppm Au. DDH 19 returned up to 0.16% Cu. DDH 20 returned 3.3 oz/t Au and 6.07 oz/t Ag from a quartz vein with 4% coarse sphalerite, 2% coarse chalcopyrite, minor pyrite, galena, and four specks of native gold. DDH 21 returned up to 2.04 oz/t Au and 2.2 ppm Ag from a quartz vein with minor chalcopyrite, pyrite, pyrrhotite, and several very fine specks of native gold, and 1.26 oz/t Au and 11.6 ppm Ag from a quartz vein with coarse pyrite in a quartz-albite porphyry (Assessment report 42L06NE0017). Kowkash Gold’s DDH 22 returned up to 0.249 oz/t Au (8.54 g/t Au) and 3400 ppm Cu over 1.4 feet from an andesite containing a quartz vein with 15% sulphides (70% pyrrhotite and 30% chalcopyrite) and a very fine speck of visible gold. DDH 25 returned up to 2.10% Cu and 0.041 oz/t Au (1.41 g/t Au) over 0.7 feet from a rhyolite with bands of pyrrhotite and a quartz vein containing chalcopyrite, pyrrhotite, and pyrite (Assessment report 42L06NE0014). Jonsmith Mines had samples that returned 15.01% Cu, 8.14 oz/t Ag, and 0.01 oz/t Ag and 5.14% Cu, 3.82 oz/t Ag, and 0.04 oz/t Au from trench T-10 (Assessment report 42L06NE0019).
Mono - Copper, nickel, lead and zinc deposits of Ontario
Publication Number: MDC012 Page: 349 Date: 1969
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
Folio - O'Sullivan Lake area, District of Thunder Bay
Publication Number: GDIF017 Date: 1997
Author: Thunder Bay RGO
Publisher Name: Ontario Geological Survey
Location:
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